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iVinArrow [24]
4 years ago
8

Select TWO values of x that are roots

Mathematics
2 answers:
faltersainse [42]4 years ago
4 0

Answer:

answers are C and F above on Apex

Step-by-step explanation:

Sauron [17]4 years ago
3 0

x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\y=x^2+3x+5\\\\a=1;\ b=3;\ c=5\\\\b^2-4ac=3^2-4(1)(5)=9-20=-11\\\\x_1=\dfrac{-3-\sqrt{-11}}{2\cdot1}=\dfrac{-3-\sqrt{-11}}{2}\\\\x_2=\dfrac{-3+\sqrt{-11}}{2}

Answer: A and B.

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in a survey 9 out of 10 doctors recommended a certain medicine if 80 doctors were surveyed how many doctors recommended the medi
ale4655 [162]

Answer:

72 doctors recommended the medicine

Step-by-step explanation:

The question above is interpreted thus.

9 out of 10 implies 9/10. If 80 doctors were surveyed, the number of doctors that recommended the medicine is 9/10 of 80 doctors. Therefore,

\frac{9}{10}  \: of \: 80

=  \frac{9}{10}  \times 80

=  \frac{9 \times 80}{10}

=  \frac{720}{10}

=  72

Therefore, in a survey where 9 out of 10 doctors recommended a certain medicine; and 80 doctors were surveyed, 72 doctors recommended the medicine.

6 0
4 years ago
????????????????????????????
aliina [53]
9x > 72
_ This is the line under the sign of at least.
Then graph this equation
6 0
4 years ago
What is the area of a rectangle with width 2/5 in. and length 3/5 in
Oxana [17]
Area = Length * Width 
A = 2/5 * 3/5
A = 6/25 in2

In short, Your Answer would be Option B

Hope this helps!
4 0
3 years ago
Janine has two choices for paying off her credit card balance. She can make payments of $186 per
Art [367]

Answer:J:$864

Janine has $865

7 0
4 years ago
Read 2 more answers
PLEASE HELP! I HAVE A CHAPTER TEST TM ON THIS
KIM [24]

Answer:

a{}^{2}  -  {b}^{2}  =  {c}^{2}

12 {}^{2}  - (3 \sqrt{7})^{2}

144 - 63 = 81

\sqrt{80 }  = 9

5 0
2 years ago
Read 2 more answers
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